Crown block bearing



R. R. BLoss ET A1.

CROWN BLOCK BEARING Filed April 5. 1927 Feb. 21, 1928.

INVENroR.

BY m

ATTORNEY.

Patented Feb. 21, 192s.

UNITED STATES PATENT OFFICE.V

RICHARD R. BLOSS AND ROY C. IFIL, GF (3"OLIJ'1YII3USy OHIO, ASSIGNORS T0 THE INTERNATIONAL DERRICK 85 EQUIPMENT COMPANY, OF COLUMBUS, OII1O,'A`

Application kiled'April 5,

Our invention relates to crown block bearings and pertains especially to the provision of bearings of simple construction which are readily adjustable.

' Heretofore, crown block bearings, when adjustable,fhave been equipped with an unnecessary number of bolts or securing means. Usually, these adjustable bearings have been so constructed as to be larger than is desirable under many conditions of installation. Likewise, they have usually been of such a struct-ure as to limit a given bearing to use 'At the same time, the bearing which -we have devised is readily adjustable both laterally and longitudinally of the beam upon which it is mounted and, in fact, is capable ofa partial rotatory adjustment. Likewise, our

novel type of bearing is readily adjustable v to iit beams which are provided with flanges of different dimensions.'

Furthermore, `when two of our bearings are utilized in the normal manner, they are capable of ready adjustment towardl and from each other. Y l

Ve preferably attain the various features of adj ustability of our bearings by utilizing adjustable hook bolts. These adjustable hookv bolts are of peculiar construction and,

inconjunction with the comple'mental partsV of the bearing, they not only serve to securev the bearings to the beams but they serve to make possible the 4various adjustments indi'- cated without detracting from the-security and rigidity of attachment of the bearings to the beamsupon which they are'mounted. The preferred embodiment of our inven-Y tion is shown in the accompanying drawings wherein similar characters of reference designate corresponding parts andvwherein Figure l'is a side view ofoneof our bearings, partly 'broken away, illustrating the manner in which the 'bearings may be adjusted with relation to the supporting beam.-

Figure 2 1s a side view of one of our bearmr i CROWN BLOCK BEARING.

192'?.y Serial No. 181,230.

ings showing the manner in which thel hook bolts may be adjusted to lit the flanges of a larger beam than that shown in Figure 1.

`Figure 3 is a perspective view of a beam with one of our bearings attached in diagonal relation.

Figure lis a plan view of two sheaves mounted upon spaced beams and illustrating the rotatory adjustment `of one set of our bearings so that one sheave may be disposed at an angle with relation to anothersheave.

Figure 5 is-a section taken on line 5-5 of Figure l. Y

Figure 6 is a section taken on line 6-6 -of Figure 1. I r

In the drawings, our invention is shown as comprising a lower section land an upper section 2 designed to be superimposed thereon.V These sections are provided, as shown in Figure 3, with complemental ysemi-cylindrical grooves that cooperate to form a journal bearing 3.

As shown best in Figures l, 5 and 6, the lower section l of the bearings is provided in keach of its four corners with bolt holes. These bolt'holes are circular in cross-section in the upperparts thereof, as at 4V, and are rectangular in cross-section in the lower parts thereof, as at 5. The lower ends of the rectangularly yformed portions 5" of the holes are flaredy in one direction, as at 6, for a purpose that will-subsequently be made apparent. .E j Y lounted within these holes of the block section l, are claw-footedbolts 7. These bolts' are threaded at their upper ends and are circular in crossesection from their upper ends ydownwardly for a greatery portion of their lengths, as at 8. However, adjacent their lower 'ends for a substantial distance,

4 of the lower blocksection while the rectangular portions9 of thebolts t closely in theY rectangular portions 5 of the holes.

Above the'block l, these bolts are provided with cot-ter pins or keys k12 which permit of --first removing' thel nuts 15.

tommunic'atefwith lower holes '14. These vlower holes' 14 are larger in' cross-section than the; upper holes 13 and," in fact, are sufliciefntly largev to perm-it free up and down n'o'vement of the cotter pins 12. Nuts 15 are provided for thejupper threaded ends 7 df the bolts.k

In operation, each bearing is,.preferably,

"placed upon an -beam A, as in Figure 1,'or as 'at"B, in Figure 2. Vbolts vare designed to embrace the upper The claw feet of the flanges ofthe I-beam. 1When applying the bearing, the upper section 2 is removed by `When this is done, thebolts drop downwardly untiltlie c'otter pins 12 rest upon the upper surface of the section 1, at which timethe rectangular portions of the bolts have passed below Vthe rectangular portions of the holes and the 'claw f'eet be rotated suinciently to clear theV flange of the I-beam.

When this has been accomplished, the journal of -a sheave 16 or 17l is placedwithin the semi-cylindrical recess in the top of the section' 1. Then, section 2 is superimposed uponthe section 1 so 'that the journal of the `Vsheave' is embraced by the cylindrical recess and the bolt holes in the section 2 receive 'the lupper ends of the bolts which lhave been *prevented yfrom dropping downwardly out of the section by the cotter pins 12.

V*litt-this time, the' bolts are lifted upwardly until the wedged surfaces 11 of the claw feet *are in close proximity to the under surfaces of the flanges of the beam. The nuts 15 are 'then applied and are tightened until the flanges of the beam are firmly clasped between'the Alow'ersurface of the section 1 and vthewedged-sur-face 11 of the claw foot of "each bolt;

It will be observed 'that the `flanged surface 6 and the cutaway portion "immediatelyv therebeneath permit of variable :positions of vertical adjustment of the bolts, Y this being further permitted by the enlargedv i bolth'oles 14 in the upper section 2. j The one result Ais that beams whoseflanges are 'of "drawings Furthermore, the bearing ymay* fdifferent weight vand thickness may be cla-sped with equal firmnessand rigidityiby the same set of' bolts, this being illustrated byv comparison vof Figures 1A and 2 'of the be shifted laterally without moving the 'from dropping entirely beam by raising the claw feet yof the bolts on the other side of the bearing, owing to the fact that the inclined or wedged surface 11 of the claw feet may grip the beam flanges at-various points of contact with equal firmness. Also, by manipulating these bolts so that the bolts on one end of the bearing project unequal distances below the bearing and that thefbolts on the opposite end of the bearing also project unequal distances in opposite directions, while all of the bolts clamp the beam flange, 4asheave may be held firmly at an angle to the direction of extension of the beam, as shown in Figure 1. A

Thus,` it will be seen that we have provided a novel and simple form of bearing structure wherein the bolts which clamp lthe bearing lsections together also clamp the bearing to the beam. It will also be seen that these same bolts are adjustable to permit adjustment of the bearings and thelbeam relatively to varying positions. It will likewise be seen: that we have provided a very simple bolt structure which permits of partially rotating the bolts to facilitate application and, yet, which ensures against the accidental rotation of these bolts when .they are in clampingl position.y Likewise, it will be 'evident that the upper sections of our bearing blocks are readily removable and,

yet, bolts, though `dropping to a position to Afacilitate ready application, are prevented out of the lower bearing block.

Having thus .described our invention, what we claim is:

1. A `crown block bearing comprising aL lower section, an upper section, means for securing said sections together, the same 'means securing said sections to a beam, saidY ico means being constructed fto permit relativelateraladjustmentof said bearing and-said beam. i Y

2. 4A crown block bearing comprising a lower section, an upper section, means for securing said sections together, the same meanssecuring said sections to ay beam, 4said means being constructed to permit applica-l tion to beams having flanges lof 'vary-ing dimensions. f

3. A crown Vblock bearing comprising a llower section, an upper section, means for securing said. sections together, the same means securing said sections to afbeam, said lmeans being adjustable to permit partial relative rotation of ysaid bea-ring and 'said -beam tolwhich it is attached.

4. Means for'attach-ing an elementy tol a beam comprising gripping members withv inclined gripping surfaces, the incline. of these Asurfaces being such that adjustment of said membersV to attach the element to `different width beams will result in contacting of different 1locations ren said 'surfaces with the beams but with equal degrees of rigidity.

of said members toy attach the element tol different width beams will result in contacting of different locations on said surfaces with the beams but with equal degrees of rigidity by endwise adjustment of said gripping members. v

6. Means for attaching an element to a beam comprising gripping members so constructed that said element can be. adjusted laterally to different positions on said beam by independent adjustment of saidy members to varying degrees, said members vhaving gripping surfaces so inclined that such adjustment thereof will result in contacting of different locations on said surfaces with the beams but with equal degrees of rigidity.

7. Means for attaching an element to a beam comprising gripping members yso constructed that said element can be adjusted rotatably to different positions on said beam by independent adjustment of said members to varying degrees, said members having gripping surfaces so inclined that such adjustment thereof will result in contacting of different locations on said surfaces with ythe beams but with equal degrees of rigidity.

8. Means for attaching an element to a beam comprising gripping members with inclined gripping surfaces, the incline of these surfaces being such that adjustment of said members to attach the element to different width beams will result in contacting of different locations on said surfaces with the beams but with equal degrees of rigidity by independent adjustment of `said gripping members to varying degrees. j

9. A crown block bearing comprising a block made up of a lower and upper section, each section being provided with holes extending therethrough, the holes adjacent the bottom of said lower section having a portion cut away, and gripping members extending through the holes in each of said sections and having at their lower ends inclined surfaces engaging the flange. of a beam.

l0. A crown block bearing comprising a block made up of a lower vand upper section, each section being provided with holes extending therethrough, the holes adj acent, the bottom of said lower section having a portion cut away, and gripping members extending through the holes in each of said sections and having' at their lower ends inclined 'surfaces engaging beam flanges of varying dimensions.

ll. A crown block bearing comprising a block made up of a lower and upper section, each section being provided with holes extending therethrough,y the holes adjacent the bottom of said lower section having a portion cut away, and gripping `members extending through the holes in each of said sections and having at their lower ends inclined surfaces, the inclined surfaces of said members being arranged at opposite edges of the lowerblock section and extending downwardly and inwardly to engage the opposite edges of a beam flange.

12. A crown block bearing comprising a block made upk of a lower and upper section, each section being provided with holes extending therethrough, the holes adjacent the bottomof'said lower section having a portion cut away, and gripping members extending through the holes in each of said sections and having at their lower ends inclined surfaces vengaging thewflange of a beam, the incline of these surfaces being such that the said block can be attached to vbeams of varying degrees of rigidity by RICHARD R. BLoss. nor o. PFEIL. I 

